Hitachi UTOPIA RAS-4HVRP2E - Page 226

10 Troubleshooting
Initial troubleshooting
SMGB0136 rev.0 - 07/2021
224
The Compressor
does not Stop or
Start even if the
Setting temperature
on LCD is changed
(**)
In case that thermistor of
remote control switch is not
used, set at “00”.
In case that room thermostat
is not used, set for input
signal actually used. If no
signal is used, set at “00”
Check Setting Condition
of “Thermistor of Remote
Control Switch” by Optional
Setting
*Setting and Control
Check Setting Condition of
“i1” and “i2” by Input/Output
Setting
*Setting and Control
“01”: Room Thermostat
(Cooling)
“02”: Room Thermostat
(Heating)
“00”: Control by Indoor
Thermistor for Suction Air
“01”: Control by Thermistor
of Remote Control Switch
“02”: Control by Average
Value of Indoor Thermistor
for Suction Air and
Thermistor of Remote
Control Switch
Incorrect optional setting
Incorrect Input/Output
Setting
Phenomenon
Cause
Check Item
Action (Turn OFF
Main Switch)
Airowvolume
“HH2” is not
indicated on the
wired controller.
Incorrect wired controller
model
Check that remote control
switch or transition wiring is
connected to indoor unit(s)
with4internalairow
volumes.
Connect wired controller or
transition wiring for wired
controller to indoor unit(s)
with4internalairow
volumes if necessary.
? NOTE
• (*): Refer to the item “10.4.2 RSW, DSWs and LEDs functions RAS-(4-6)HV(R/N)(C/P)2E” or “10.4.3 RSW, DSWs and LEDs functions
RAS-(4-6)H(R/N)(C/P)2E” in these chapters.
• (**): Even if the controllers are correct, the compressor does not operate under the following conditions:
- Indoor air temperature is lower than -21°C or the outdoor air temperature lower than -5°C for individual operation mode, -15°C for
simultaneous operation mode, during the cooling operation.
- Indoor air temperature is higher than 27°C or outdoor air temperature higher than 18°C during the heating operation.
- When the cooling (or heating) operation signal is sent to the outdoor unit and a different mode as heating (or cooling) operation
signal is sent to the indoor units.
- When the demand or emergency stop signal is sent to the outdoor unit.